Improvement in machines for polishing the eyes of needles



F. H. BRADLEY.

Machines fQr Polishing the Eyes of Ne edles.

No. 146,747. Pz itenped Jan. 21, 874.

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AMPHDM-L/THIM/iM/l/t ro- MX {mm/rs mucus UNITED STATES PATENT O'rFIcE.

' FREDERICK II. BRADLEY, OF BRIDGEPORT,CONNECTICUT.

IMPROVEMENT lN MACHINES FOR POLISHING THE EYES OF NEEP LE S.

Specification forming part of Ltttns Patent No. 146,747, dated January 27, 1874; application filed January 9, 1874.

To all whom it may concern:

chanical appliances, giving them an oscillating reciprocating motion on the polishing material for the purpose of removing irregir larities, and giving a finish to the eye.

This invention is more particularly adapted to polishing the eyes of sewing-machine needles, but can be used for other varieties.

Figure 1 is a longitudinal plan. Fig. 2 is an end view. Fig. 3 is a detail of clamp.

A A, Fig. 1, is the bed-plate; B, pivot-bed; c, reciprocating cams; D, motor-slide; E E E, clamps; FF, needles; G,polishing-thread; H, spool; 1 1, thread-holders; t t, boxes; m, clamp-levers; N, connecting-rod O, crankshaft; 10 p, stopsprings; q q, adjustingscrews.

The manner of construction is as follows: The bed-plate A A is of cast-iron. To this are cast the boxes t it. Through these boxes the motor-slide 1) works, secured in position by caps 1'. Parallel with this, and secured in position by standards 2 2, is the pivotbed B. ()n the upper face of this bed the circular platforms 6 are provided by being cast with it, or secured by any other mechanical arrangement suitable. On these platforms the clamps E E are secured by a bolt or pin, on which they oscillate. These clamps are con structed of three parts, the bed 3 having the ears 4 4 4t 4 arranged to receive the tongue of the clamp, the back ears with the pin 5 forming a hinge. The front ears act as guides for it sidewise, and provide for securing the camlever m, which forces the tongue down to the bed. In the front end of clamp the recess 7 is made to receive the shank of needle. I At .the back end I provide the slot 8 to match pin 9, which is secured to the motor-slide D, by which the clamp receives i s oscillating motion.

To provide for the action of the polishingthread on ends of the eye, the same being oblong, I arrange the crescent-shaped cams c c rigidly on the pivot-bed, and those on the motor-slide D are adjustable by the assistance of the screws a a. To allow for the re ciproeating motion of clamp-bed, an allowance is made in the openings, into which the standards 2 2project. To keep this bed in position against the cams, the springs -11 p are secured to the main bed. The polishing thread is kept in place by the thread-holders 1 1 the thread passing through the slots 0 c, and between springs d d and stand. To provide for the different lengths of needles, the slot d in foot of thread holder 1, through which the screw clipasses, allows said holder to be secured at any desired, length. The spool for thread revolves on pin y.

To give the motion to motor-bed D, 1 arrange the conneoting-rod N and crank-shaft O with pulley X.

The manner of operation is as follows: The pivot-bed B is taken from its position in main bed. The needles are then strung on a thread prepared with oil and emery, and put in position in the clamps E E. The thread is drawn taut, and secured in the slots 0 c, and secured by springs d d. The machine is then put in motion, and the oscillating reciprocating motion imparted by the cams c and pins 9 causes the needles to operate on the prepared thread, and the eyes are thus polished perfectly.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination of the bed B, provided with cams c, the holders E, the springs 12, with the reciprocating motorslide I), provided with cams, substantially as shown and described.

2. The combination of the pivot-bed B, provided with cams c, the pivoted holder. E,

spring with the motorslide D, provided with cams, and the shown and described.

SJThe arrangement of the polishing-thread l, thread-holders 1. 1 with groove 0, c, springs 61 (1, slots (1 d screws (1 for the purpose shown.

-;L. The combination of bed A 1notor-s1ide 'D,pivot-be(1 B, clamps E E, standards 2 2, thread-holders l 1 boxes t t, connecting-rod pins 9, substantially as 

